Chemistry

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Across
  1. 4. neutral particles
  2. 6. Bohr model of atom
  3. 7. Positively charged particles
  4. 8. negatively charged protons
  5. 11. Chemical reaction is a rearrangement of atoms
Down
  1. 1. substance consisting of atoms which have the same number of protons
  2. 2. discovered the electron
  3. 3. number of electrons
  4. 5. gold foil experiment
  5. 7. number of electron shells
  6. 9. discovered first neutron
  7. 10. Unit of a Chemical Element